I know android has issues with correct battery calibration but I am wondering if the belief of people is right in that calibration improves battery life. I think calibration is supposed to let you see the true level of your battery at a particular time?
OR am I wrong?
You're right, it doesnt improve battery
Calibrating your battery (if done properly) brings up your battery life upto spec IMO... It's no myth.
Prasad007 said:
Calibrating your battery (if done properly) brings up your battery life upto spec IMO... It's no myth.
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The battery won't get better with the capacility or so, it will just use the full battery if it is calibrated right
Lol my english
I believe that with 10 or 20 charge system calibrates the battery too without erasing batterystats
as far as i know, battery calibration is really required for all devices that uses lithium ion batteries.
that is because, the usual notion that in order to preserve your battery life, you need to charge it only if its fully drained is only true for ni-cad and older rechargeable batteries, and is not true for lithium ion.
lithium ion needs to have a constant cell charge (cells are what makes up your battery inside) . meaning it would damage your battery if you drain it to 0%.
now this process of constantly keeping your battery charged, sometimes would confuse the battery's configuration (as lithium ion batteries actually have their own CPU boards inside them that acts as protection). now in order to correct that confusion, battery calibration is required once in 30days.
the calibration process is draining your battery till it turns itself off then charging to 100% while the device is turned off.
head over here for an explanation.
Tuhoaja said:
The battery won't get better with the capacility or so, it will just use the full battery if it is calibrated right
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^^What he said!
Battery stats wipe them and your phone will restart the stats from zero .
Dont wipe battery stats and phone takes about two weeks to normalize battery stats ..
Wipe battery stats only required after flashing new rom .
jje
Related
Is there a software that control how your battery will be charged?
I know there is a tweak that allow your device to connect to your phone and sync without charging it.
However, I'm looking for a program that will let my battery drain till like 2% before it start charging. The reason I want this to happen is because it'll improve the performance of my battery. It's always good to drain out the battery before fully charge it again.
I don't know about any app that will do that for you, but no charging while syncing can be done in the settings:
settings/system/energy -> Don't charge while conected to PC
Interresting?
You said you want to discharge your battery to almost 2%
Mayby interesting to read the story about Li-ion batteries.
http://www.batteryuniversity.com/index.htm
They say that's it isn't always good to discharge the Li-Ion battery totally.
besides:
Low Maintenance - no periodic discharge is needed; there is no memory.
Good Luck,
Greeting
FritZ
Fred1987 said:
You said you want to discharge your battery to almost 2%
Mayby interesting to read the story about Li-ion batteries.
http://www.batteryuniversity.com/index.htm
They say that's it isn't always good to discharge the Li-Ion battery totally.
besides:
Low Maintenance - no periodic discharge is needed; there is no memory.
Good Luck,
Greeting
FritZ
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That's interesting
Thanks
this is totally wrong
you drain the ni/cd batteries for better performance not the cellularphones.
you drain the cellularphones battery ,potentially kill some battery cells.
drain it to 2% more than 15 times kills half of it capacity and/or age.
So...I don't think this has been brought up here before, so I figure I'll be the dummy who asks. If I recalibrate (bump charge), and wipe battery stats, is it safe to assume that swapping out batteries (spares) will mess this up? I plan on picking up a spare battery, but wondered about this. Any input? Thanks in advance.
Not sure about the "bump" policy around here. but...........BUMP
Just charge the battery and use the phone. Don't get caught up in the whole wipe stats to create longer battery life craze.
I just swap batteries when needed about midday. I ignore the battery stats. They don't affect my use of the phone.
newter55 said:
Just charge the battery and use the phone. Don't get caught up in the whole wipe stats to create longer battery life craze.
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I understand that wiping stats does not "improve" battery life. but I have no problem believing that with a recalibrated battery (@ 100%), wiping stats will help the phone/battery meter "read" more correctly.
ua549 said:
I just swap batteries when needed about midday. I ignore the battery stats. They don't affect my use of the phone.
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I thought so too, but I believe coupling it with a bump charge helped me a lot. I'll explain:
I recalibrated my battery about a week ago, (didn't know about wiping stats) I improved by about 3 or 4 hours daily, bringing me up to about 15 hours of use on a charge.
However,before I posted this thread, I did a recalibrate along with a wipe, then allowed the battery to drain and then a complete recharge. As of right now (27 1/2 hours later) I'm still looking at 30%
However, thats not why I started this thread though, I am simply wondering if swapping batteries back and forth will affect the stats and how the phone reads the state of the battery. (makes sense that it would I guess)
any input on THAT would be awesome, thanks in advance.
True. Unplugging the charger as soon as it shows 100% won't give you a full charge since it's not really accurate. I believe the charge complete notification is triggered by the charger shutting down. Not positive but I have noticed that can be triggered at varying times after 100% is reached.
Swapping batteries does mess it up but I can't say how much. There's always going to be a difference in charge between the two, and depending on different brands, a difference in the battery capacity and voltage at different % levels.
In short: The charge circuit measures amps going in and coming out, and remembers voltage levels at different times, so swapping batteries or using external chargers probably confuses it a bit.
Would it be possible to just create a separate batterystats file for the spare battery and swap out the files when the batteries get swapped out?
There was a post recently by a Google engineer, Dianne Hackborn (can't link yet, just google "Dianne Hackborn battery stats" and you should find it).
It explains that the battery stats come from data/system/batterystats.bin and are reset every time you unplug with a "relatively full charge." The file is reflected in the battery use screen.
It won't affect how much battery level is shown to you or how long your battery lasts.
Hi !
I have a nook HD+ which has been behaving strangely. Its battery life has reduced lately. I initially had problems with 'media' and 'SDcard' draining it quickly. But I was able to check that by formatting my SD card and deleting two 0 kB files in my internal memory.
However, the battery life, since, has not improved much. Moreover, I have started to see a few spikes in the battery charge chart (like the one in the pictures attached with this post) without having plugged the Nook in.
I am on CM 11 snapshot M8. I have already tried calibrating my battery by charging it to 100% and then removing batterystats.bin system file through PlayStore's 'Battery calibration' app, but the issue still remains unresolved.
Has anyone else faced a similar issue with her or his Nook ?
You cannot calibrate batteries in Android. Those silly apps just delete batterystats.bin and that is an Android file responsible for the statistics seen in your third screenshot. It gets deleted automatically when you unplug the charger at an almost 100% charge level, and it has nothing to do with the reported battery level!
The battery percentage as shown by Android comes from the kernel, the power management unit (PMU) driver to be more specific. The PMU, which usually is a separate chip inside the device, is responsible for monitoring, charging, and discharging the battery, among other things. There are many different PMU models, so this is highly hardware-dependent, and there most likely are no apps out there that can directly talk to all the existing PMUs to do something that's actually meaningful (which deleting batterystats.bin is not).
The only thing you can do is once in a while discharge the battery until the device turns off, then recharge it in one go to full capacity. That way, the PMU hopefully "calibrates" its battery monitoring by itself and should report more accurate state of charge values again. Measuring a battery's state of charge is rather difficult and not an exact science. Those percentage values are only estimates. So, the spikes you see on the battery percentage chart are a result of the imperfect method that is used to calculate the current battery percentage. Maybe this gets worse with aging batteries, I don't know. There's nothing really you can do, other than the complete discharge/recharge cycle you've already tried. Maybe a future firmware will come with a better battery percentage calculation method - but as I said, this is totally independent from Android, it's a low-level hardware and kernel driver thing.
Thanks a lot. A very informative post indeed !
Full battery charge/discharge cycles seems like the only solution then.
How will it affect the battery and its capacity to retain the charge though ?
To prevent any misunderstanding: you should definitely not discharge your lithium-ion based batteries to 0% all the time. Li-ion batteries live longer if they are kept between 40% and 80% charge. At 80% you won't get the full capacity / runtime, of course, but the battery will be able to endure more charge/discharge cycles that way. As I said, discharging to 0% followed by recharing to 100% should only be done occasionally, if you feel that the reported battery percentage has become too inaccurate. It probably won't fix the "ghost recharging" seen on the Nook and other devices. What probably happens here is that the battery's voltage is factored into the state of charge calculation. Li-ion batteries are usually charged to 4.2V per cell, which is "100%", and discharged to some arbitrary voltage, e.g. 3.5V, which would be considered "0%". Inbetween, the voltage curve is not linear. That is, 50% would not necessarily correspond to 3.85V (=(4.2+3.5) / 2). Also, the voltage depends on the power draw to some extent. If the tablet draws a higher current from the battery, the voltage will sag. If you then put the tablet into standby, reducing the current to a very small value, the battery voltage will recover and increase again a bit. This is what might cause those spikes (although they shouldn't be that large).
This and more can be learned on Battery University. And here's a source for the batterystats.bin calibration myth.
Thanks a lot Tzul. You have been very helpful !!
I may have to replace my battery soon. If the battery life does not improve, I guess I will have to buy a replacement battery from a third party replacement battery seller.
Haven't had a new phone in a while now and I can't find it anywhere wether I should format the battery on the first few charges and if so, what is the procedure?
You don't have to do it. You just remember to not to completely discharge your battery and you will be fine.
Lithium-ion battery or Lithium polymer battery doesent have to be formated, or formed !
Only Nickel–metal hydride battery (NiMH) have to be formed.
L-Ion on the other hand doesen't like to be drained to 0%, if you want to prolong the battery life, you shouldn't let the battery to get under 30% if you can manage to do that in real life.
EDIT: What is your Battery health stats as seen within AccuBattery?
uhm what?
hexr45 said:
uhm what?
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exactly :d probably he forgot to insert some screenshots
WITHIN ACCUBATTERY APPLICATION THERE IS A HEALTH TAB WHICH SHOWS YOUR BATTERY HEALTH STATS, I kept getting an error when I tried to upload an image, sorry.
battery health
mmm in accubattery it shows its 94 % but in phone info it shows its 100 % my is brand new i got it like 4 days ago it doesnt make sence that the battery capacity has decreased by 6 %
On the devices with a battery (like notebooks, tablets and phones) the OS usually increases the shown battery wear and this decreases the shown battery health. And because of that, phone thinks the maximum battery capacity is now lower than the designed (factory) battery capacity.
This means, when the designed battery capacity is 5000mAh, it shows 100% when its 5000mAh. But when it decreases to 4950mAh, its 100% at 4950 mAh. This protects the battery from charging fully. And finally, the battery lasts longer before you need to change it. So, 94%, 96% or 90% is quite normal and you do not need to worry.
y.erenbektas said:
On the devices with a battery (like notebooks, tablets and phones) the OS usually increases the shown battery wear and this decreases the shown battery health. And because of that, phone thinks the maximum battery capacity is now lower than the designed (factory) battery capacity.
This means, when the designed battery capacity is 5000mAh, it shows 100% when its 5000mAh. But when it decreases to 4950mAh, its 100% at 4950 mAh. This protects the battery from charging fully and finally, the battery last longer time before you need to change it. So, 94%, 96% or 90% is quite normal and you do not need to worry.
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How about fast-charging the battery, in which the A70 supports. Would that be causing an issue for the health of the battery?
abdimussa93 said:
How about fast-charging the battery, in which the A70 supports. Would that be causing an issue for the health of the battery?
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I am sure they wouldn't add this feature if it would cause any issue for the health of the battery. Even if it does hurt, it probably won't be noticeable.